When installing Facebook Messanger app for iPhone, it automatically knows who I am and says: “Logged in as: xxxxx”, continue?
How do they know that? An iPhone app shouldn’t be able to access another app…
Anyone has any clue?
When installing Facebook Messanger app for iPhone, it automatically knows who I am and
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Keychain data can be shared between applications from the same organisation. More info in this SO question:
How to share keychain data between iOS applications